| Echinosphaerium | <protozoa> Previously Actinosphaerium. Genus of the order Heliozoida of the Protozoa. The organisms are multinucleate and have a starburst of radiating axopodia, the microtubules of which have been much studied. (19 Jan 1998) |
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| echinostoma | A genus of intestinal flukes of the family echinostomatidae which consists of many species. They occur in man and other vertebrates. The intermediate hosts are frequently mollusks. (12 Dec 1998) |
| echinostomatidae | A family of flukes (trematoda) characterised by a collar of spines at their anterior end. The body is elongated and is covered with spines, and the two suckers are usually close together. (noble et al., parasitology: the biology of animal parasites, 6th ed, p183) (12 Dec 1998) |
| echinostomiasis | Infection by flukes of the genus echinostoma. (12 Dec 1998) |
| echinozoa | <zoology> The Echinodermata. Origin: NL, fr. Gr. An echinus + an animal. Source: Websters Dictionary (01 Mar 1998) |
| echinulate | <botany> Set with small spines or prickles. Source: Websters Dictionary (01 Mar 1998) |
| echinus | Origin: L, a hedgehog, sea urchin, Gr. 1. <zoology> A hedgehog. 2. <zoology> A genus of echinoderms, including the common edible sea urchin of Europe. 3. The rounded molding forming the bell of the capital of the Grecian Doric style, which is of a peculiar elastic curve. See Entablature. The quarter-round molding (ovolo) of the Roman Doric style. A name sometimes given to the egg and anchor or egg and dart molding, because that ornament is often identified with Roman Doric capital. The name probably alludes to the shape of the shell of the sea urchin. Source: Websters Dictionary (01 Mar 1998) |
| Echis | The saw-scaled or carpet viper, a genus of small (under 1 m), irritable, and alert snakes with a highly toxic venom; they are responsible for numerous snakebite cases with many fatalities. Origin: G. Echis, a viper (05 Mar 2000) |
| echistatin | <protein> Disintegrin found in the venom of the saw scaled viper, Echis carinatus. (18 Nov 1997) |
| echiuroidea | <zoology> A division of Annelida which includes the genus Echiurus and allies. They are often classed among the Gephyrea, and called the armed Gephyreans. Origin: NL, fr. Echiurus, the name of one genus (Gr. An adder + tail). Source: Websters Dictionary (01 Mar 1998) |
| echo | Origin: L. Echo, Gr. Echo, sound, akin to, sound, noise; cf. Skr. Va to sound, bellow; perh. Akin to E. Voice: cf. F. Echo. 1. A sound reflected from an opposing surface and repeated to the ear of a listener; repercussion of sound; repetition of a sound. "The babbling echo mocks the hounds." (Shak) "The woods shall answer, and the echo ring." (Pope) 2. Sympathetic recognition; response; answer. "Fame is the echo of actions, resounding them." (Fuller) "Many kind, and sincere speeches found an echo in his heart." (R. L. Stevenson) 3. A wood or mountain nymph, regarded as repeating, and causing the reverberation of them. "Sweet Echo, sweetest nymph, that liv'st unseen Within thy airy shell." (Milton) A nymph, the daughter of Air and Earth, who, for love of Narcissus, pined away until nothing was left of her but her voice. "Compelled me to awake the courteous Echo To give me answer from her mossy couch." (Milton) Echo organ, a stop upon a harpsichord contrived for producing the soft effect of distant sound. To applaud to the echo, to give loud and continuous applause. "I would applaud thee to the very echo, That should applaud again." (Shak) Source: Websters Dictionary (01 Mar 1998) |
| echo beat | Extrasystole produced by the return of an impulse in the heart retrograde to a focus near its origin which then returns antegradely to produce a second depolorization. (05 Mar 2000) |
| echo planar | A method of magnetic resonance imaging that allows rapid image acquisition during free induction decay, using technically difficult rapidly oscillating radiofrequency gradients. (05 Mar 2000) |
| echo reaction | A disorder of speech where there is an involuntary repetition several times of the same word. (27 Sep 1997) |
| echo speech | A disorder of speech where there is an involuntary repetition several times of the same word. (27 Sep 1997) |